Ferrous (II) Sulfate Heptahydrate, chemically represented as FeSO₄·7H₂O, is one of the most widely used iron salts in both industrial and agricultural systems. Commonly known as Ferrous Sulfate Heptahydrate or historically as Green Vitriol, this compound appears as pale blue-green monoclinic crystals containing seven molecules of crystallization water.

Zinc Sulfate Heptahydrate (fertilizer grade) is a chemical compound with the formula ZnSO4·7H2O. It is commonly used as a source of zinc in the agricultural industry, particularly as a micronutrient fertilizer. Zinc is an essential element required for a wide range of biological functions in plants, including enzyme activation, protein synthesis, and growth regulation.